Bill Speidel's Underground Tour (Pioneer Square)

Bill Speidel's Underground Tour offers guided tours beneath Pioneer Square that explore the remnants of the original street level and storefronts from before Seattle's regrading and reconstruction after the Great Seattle Fire of 1889. The tours interpret urban development, early commercial architecture, and the city's post-fire rebuilding history using preserved underground spaces. The company has operated heritage walking tours in Pioneer Square since the mid-20th century.